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/***************************************************************************
* Copyright (c) 2024 Microsoft Corporation
* Copyright (c) 2026-present Eclipse ThreadX contributors
*
* This program and the accompanying materials are made available under the
* terms of the MIT License which is available at
* https://opensource.org/licenses/MIT.
*
* SPDX-License-Identifier: MIT
**************************************************************************/
/**************************************************************************/
/**************************************************************************/
/** */
/** USBX Component */
/** */
/** Host Stack */
/** */
/**************************************************************************/
/**************************************************************************/
/* Include necessary system files. */
#define UX_SOURCE_CODE
#include "ux_api.h"
#include "ux_host_stack.h"
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _ux_host_stack_hcd_thread_entry PORTABLE C */
/* 6.1.10 */
/* AUTHOR */
/* */
/* Chaoqiong Xiao, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function is the entry point of the host controller thread. */
/* The HCD thread is initialized at the system level and the thread */
/* entry routine is invoked right away. This thread suspends until */
/* one of the HCD resumes it due to HCD activities. */
/* */
/* It's for RTOS mode. */
/* */
/* INPUT */
/* */
/* input Not used input */
/* */
/* OUTPUT */
/* */
/* None */
/* */
/* CALLS */
/* */
/* _ux_utility_semaphore_get Get signal semaphore */
/* (ux_hcd_entry_function) HCD's entry function */
/* */
/* CALLED BY */
/* */
/* ThreadX */
/* */
/**************************************************************************/
VOID _ux_host_stack_hcd_thread_entry(ULONG input)
{
UINT hcd_index;
UX_HCD *hcd;
UX_INTERRUPT_SAVE_AREA
UX_PARAMETER_NOT_USED(input);
/* Loop forever on the semaphore. The semaphore is used to signal that
there is work for one or more HCDs. */
while (1)
{
/* Get the semaphore that signals something is available for this
thread to process. */
_ux_host_semaphore_get_norc(&_ux_system_host -> ux_system_host_hcd_semaphore, UX_WAIT_FOREVER);
#if UX_MAX_HCD > 1
/* This thread was awaken by one or more HCD controllers. Check each of the HCDs
to see who posted work to do. */
for(hcd_index = 0; hcd_index < _ux_system_host -> ux_system_host_max_hcd; hcd_index++)
{
#else
hcd_index = 0;
#endif
/* Pickup HCD pointer. */
hcd = &_ux_system_host -> ux_system_host_hcd_array[hcd_index];
/* Is there work to do for this HCD? */
if((hcd -> ux_hcd_status == UX_HCD_STATUS_OPERATIONAL) && (hcd -> ux_hcd_thread_signal !=0))
{
/* Yes, call the HCD function to process the work. */
hcd -> ux_hcd_entry_function(hcd, UX_HCD_PROCESS_DONE_QUEUE, UX_NULL);
UX_DISABLE
hcd -> ux_hcd_thread_signal--;
UX_RESTORE
}
#if UX_MAX_HCD > 1
}
#endif
}
}
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